islower(): checking lower case only in a string in Python

Use the islower() method to check if the characters in a string are all in lower case.

text = 'This is a regular text'
print(text.islower())
#output: False

text = 'this is a regular text'
print(text.islower())
#output: True

text = 'this $ 1s @ a r3gular text!'
print(text.islower())
#output: True

If you notice the last example, the numbers and special characters like @ and $ in the string make no difference and islower() still returns True because the method only verifies the alphabetical characters.